Fig. 2. Effects of partial liquid ventilation on the amount of filtered fluid during a continuous hydrostatic challenge (increase in capillary pressure by 20 cm H²O). Five minutes after the beginning of the hydrostatic challenge, increasing amounts of perfluorocarbon were instilled into the bronchial system. The amount of filtered fluid was reduced immediately to approximately 50%, with 5 ml perfluorocarbon/kg body weight. Data from 6 isolated blood perfused rabbit lungs are presented as mean ± SD. P  value refers to Wilcoxon rank sum test. HCl = hydrochloric acid.